平移姿势基于旋转弄乱了方向

Question

我的手势识别器有一个小问题.

我有一个名为"Sprite"的类,它只是一个UIImageView.Sprite有自己的手势识别器和处理方法,因此用户可以平移,旋转和调整图形大小.

这是我的代码:

    -(void)setup{ //sets up the imageview...
//add the image, frame, etc.
    UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];
    UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinch:)];
    UIRotationGestureRecognizer *rotateGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(handleRotate:)];

    [self addGestureRecognizer:panGesture];
    [self addGestureRecognizer:pinchGesture];
    [self addGestureRecognizer:rotateGesture];
}

//handling methods
-(void)handlePinch:(UIPinchGestureRecognizer *)recognizer{
    recognizer.view.transform = CGAffineTransformScale(recognizer.view.transform, recognizer.scale, recognizer.scale);
    recognizer.scale = 1;
}

-(void)handleRotate:(UIRotationGestureRecognizer *)recognizer{
    recognizer.view.transform = CGAffineTransformRotate(recognizer.view.transform, recognizer.rotation);
    recognizer.rotation = 0;
}
-(void)handlePan:(UIPanGestureRecognizer *)recognizer{
    CGPoint translation = [recognizer translationInView:self];
    recognizer.view.center = CGPointMake(recognizer.view.center.x + translation.x, recognizer.view.center.y + translation.y);
    [recognizer setTranslation:CGPointMake(0, 0) inView:self]
}

所以基本上每个人都可以自己工作.但是,当我旋转或调整imageView的大小时,平移会出现问题.例如,如果你旋转ImageView的上下颠倒,则平移手势将在相反方向上移动图像(向上向下,向左拖拽移动时,它在右边,等).同样,调整大小的精灵不会像以前一样以相同的速度/距离平移.

关于如何解决这个问题的任何想法？我宁愿将此代码保存在Sprite类中而不是ViewController中(如果可能).谢谢.

Answer 1

而不是translationInView:self,尝试translateInView:self.superview.